Question about Audio Players & Recorders

Open Question

Superscope R-1220 power problem

Hello, I have found that the transistor that is in the power supply module is broken. I would like to buy another one or equivalent, but I don't know the reference of such transistor. Any idea? It also would help knowing what DC-voltages the power module has to give to the equalizer (bass and treble) module and the phono "previo" module. (I think that around 8V, but not sure). Thank you very much!

Posted by Anonymous on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
ViewFinder
  • 33 Answers

SOURCE: Motorola DC power Supply (0-40volts, 0-40 amps cc) M/N R101AA, S/N 261CCl0469

There is a book, "Electronics for Inventors" (check Amazon), that will give you the basics of power supply design and electrical components including general scematics. Without more info on what the PS is supposed to produce in the way of voltage and current, there's not much more to be said.

Posted on Mar 23, 2007

Ad
Benimur
  • 6966 Answers

SOURCE: lost power supply

Hi,

If the desktop charger is the version that can accommodate two radios simultaneously similar to the T5000, then the AC wall adapter or the power supply is 9 volts AC.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on May 26, 2008

robotek
  • 1512 Answers

SOURCE: My little Behringer Eurorack MXB1002

no worries mate.Good to hear

robotek

Posted on Jun 29, 2008

  • 631 Answers

SOURCE: Hello,

I'm not sure what you mean by 'wide open voltage'. If it's over 17v, the supply may have multiple problems. I don't have the 52kx schematic but other Pyramid supplies have over-voltage protection. There is an SCR that is triggered when the voltage gets to ~17v. This should clamp the output and trigger a shutdown. You should check the 16v Zener diode and the SCR. If the SCR or the Zener is defective, that would prevent the over-voltage from clamping the voltage. Also confirm that the SCR has a solid connection to the ground terminal of the supply. If it's open, that could prevent the clamp from shutting down the supply.

If the voltage is going high, measure the DC voltage from pin 4 to pin 5 of the LM723. It should remain the same at all times. Also measure the voltage from pin 5 to the ground terminal of the supply. That should also remain constant at all times.

Posted on Aug 20, 2008

  • 12 Answers

SOURCE: power supply/ no output voltage

Actually i haven't fixed the problem as yet but i did find some info that would help me to fix problem.
I went to google and entered keyword,,, Electronic parts,,there came up a page,,and i went to several manuf sites till i found a replacement transformer,,then i disassembled the power supply and am now waiting for a replacement transformer.

Posted on Sep 22, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

29 ltd weak on modulation


In the form of a question???? I am assuming you are hearing it on another radio or someone has told you it is quieter. A shorted coax is more likely wattage and range reduction. Proportionally reducing audio volume.......modulation. If you have only changed antenna it could be broken or could you have put the Teflon washer on the bottom of the mount rather than insulating the antenna from the mount during installation. That would result in a direct ground. Thank for reading my blither.....take care.

Jun 28, 2014 | Cobra 29 LTD CB Radio

1 Answer

Technics SU-G75 has no sound


Hello
when the resistors are burned,means that the transistors are damaged, or the power module is damaged.
and in your case its the power module.
Hope this helps.


23392686-biweyzzz1swyjlxgbbebmoak-5-2.jpg

Feb 07, 2014 | Technics SU-G75 Amplifier

1 Answer

Flickering


For Anthony Pitt, The Samsung in your questiobn does not use the same power supply, I found one tip that says to check transistor Q802S on your power supply module, to insure the middle leg of the transistor in not broken from the transistor to the pc board. Thsi can cause erratic behavior. If the screen starts to behave after it's been on for awhile, your issue may be defective capacitors. Be certain none of the capacitors have raised tops. I have had intermittent issues with 46 and 52 inch screens. Failure occurs at the ribbon connector of the lcd screen and is only repaired by replacing the screen. I've found some repair tips on You Tube, but these have not been very reliable.

Jun 03, 2013 | Samsung LN52A580 52 in. HD-Ready LCD TV

1 Answer

I have 110v XR 1220 power mixer and friend of mine plug into 240v power point, blown the two transistors ou. I do not know what short of transistors are they?


There are dozens of transistors in the unit... we can't guess which you might be refering to. The power supply of the 1200 series mixers have fuse before each part of the supply for the preamp sections.

Jul 13, 2011 | Peavey XR 1220 Powered Mixer Mixer Powered

1 Answer

The tv wont power on at all


Hello,

Your TV Won't Turn On
If your TV won't turn on, you should check the power cord. Make sure that it is securely in the wall plug. Sometimes the power cord has burned out and needs to be replaced. You may also want to check the batteries in the remote to make sure that they are working properly. If otherwise
Common problem with this TV is the power supply module.
Check the power supply; look for bad caps with leaking/bulging tops, check to see if you have standby +5vdc at the power supply connector, the front red indicator will not be on if you do not have this +5vdc standby voltage due to shorted out power transistor and zener diode, if otherwise, Power supply board just die.It can be dead at anytime.Tries websites Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

I hope this will help to solve the problem.....

Jul 07, 2011 | HP Pavilion MD5020N 50" DLP HDTV

1 Answer

I WONT TURN ON


Hello,

Common problem with this TV is the power supply module.
Check the power supply; look for bad caps with leaking/bulging tops, check to see if you have standby +5vdc at the power supply connector, the front red indicator will not be on if you do not have this +5vdc standby voltage due to shorted out transistor and zenerdiode, if otherwise, Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Hope that this will help in solving the problem, also do take care in handling the fault, because it contains high voltages...

Jun 16, 2011 | Polaroid Televison & Video

1 Answer

Won't power on


Hello,

Common problem with this TV is the power supply module.
Check the power supply; look for bad caps with leaking/bulging tops, check to see if you have standby +5vdc at the power supply connector, the front red indicator will not be on if you do not have this +5vdc standby voltage due to shorted out power transistor and zener diode, if other otherwise Power supply board just die.It can be dead at anytime.Tries websites Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Take care in solving the problem,because it contain high voltage...

Jun 14, 2011 | Televison & Video

1 Answer

I have a problem with my power supply ,my main fuse is broken when they have put in 220v source in place of 110 volt all so I have found that the power transistor (c3552) is also broken I like to have a...


If this is a 220v rated fuse then it doesn't matter that's ok, your transistor is broken or burn't then this could be a problem. The only place I know of is servicemanual.net, that's manual or with an s

Mar 02, 2011 | Televison & Video

1 Answer

Leaking of transistors


no. not only is it cheaper in the end to buy a new supply, but there are most likely more parts (which may be hard to locate without special equipment) nuked than only the transistors. so buy a new one.

Nov 15, 2007 | Intel (ATX350P4) 350-Watt Power Supply

Not finding what you are looking for?
Audio Players & Recorders Logo

Related Topics:

39 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio Players & Recorders Experts

kakima

Level 3 Expert

102366 Answers

 Grubhead
Grubhead

Level 3 Expert

5190 Answers

The Knight
The Knight

Level 3 Expert

74459 Answers

Are you an Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...